Isn't the test for croup really horrible. They go up your nose and down and scrape? Plus I heard it can take weeks for results. Am I thinking of the right sickness?
You know with the other 2 already having colds you could tell the mom that since you have two confirmed cases of croup and with the two already having colds and their immune system being low already you feel it best to really air out and disifect your daycare so you will not be open tomorrow. (and they do not have to pay, this may be a way to ease the short notice however do not mention to the others about a no pay day
Up to you!) Tell mom you would hate for their colds to get worse.